sheck



0. SHECK. DRIVING MEANS FOR CONCRETE DISTRIBUTERS.

APPLICATION FILED SEPT. 2, I920.

Patented Nov. 8, 1921.

wawm 1 J 0. SH ECK. DRIVING MEANS FOR CONCRETE DISTRIBUTERS.

APPLICATION FILED SEPT. 2, 1920.

P te tedN .8,1921. D V a 11 0V 2 SHEETS-SHEET 2.

'5/1 f A ammuvi mvu UNITED STATES PATENT OFFICE.

OSCAR SH ECK, OF MILWAUKEE, WISCONSIN, ASSIGNOR 'IO KOEHBING MACHINE COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION.

DRIVING MEANS FOR CONCRETE-DISTRIBUTERS.

Specification of Iletters Patent.

Patented Nov. 8, 192i.

Application filed September 2, 1920. Serial lie-407,764.

To all whom it may concern Be it known that I, OSCAR SHECK, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Im rovements in Driving Means for Concreteistributers, of which the following is a specification.

This invention embodies an improved drive mechanism which has been especially designed for use in concrete distributing machines of the type commonly known as Koehring pavers. This machine embodies primarily a boom and bucket attachment to a concrete mixer, the bucket being mounted so as to be supported by a carriage which traverses the boom back and forth in the operation of distributing concrete. The means utilized for operating the carria e which supports the said bucket is a cab e connected with a drum and the drum is adapted to be driven in reverse directions.

The invention hereof consists in a peculiar construction of the drum above referred to, and mode of attachment of the cable driving element for the bucket carriage, whereby the cable is so wound upon the drum' in reverse directions that as the drum is driven in one direction the cable is paid out and wound on the drum to take'up slack which would otherwise be created. The pecul iarity of the invention is that the drum and cable mode of attachment is such that as a portion of the cable previously wound on the drum unwinds therefrom, another portion of said cablepreviously unwound from the drum winds on the latter to occupy the drum surface previously occupied by the unwound portion.

By reason of the foregoing special construction and mode of attachment of the cable I am enabled to construct the drum of much smaller size than heretofore permissible, to use a less amount of cable, obtain a positive driving action throughout the operation of the drum'and cable, and effect other advantages and economies of construction which will appear more fully as a complete understanding of the details of the invention is had.

In the accompanying drawings,

Figure 1 is a side view showing a concrete distributing machine of the paver type, in part, embodying the invention.

Fig. 2 is a view more clearly showing the mounting of the drum and method of training the cable relatively to the boom.

Fig. 3 is a view 0 the drum and cable connections primarily representing a section on the line 33 of Fig. 2.

Fig. 4 is a detail view showing a modified form of drum and cable wound thereon.

In the drawings A denotes a boom and B the bucket supported on the boom by the carriage C.

The carriage C is equipped with rollers l to roll upon the flanges of the boom channels, and by drivingthe carriage back and forth in respect to the boom A the bucket B will be caused to traverse the boom for the distribution of concrete after a manner well known to those versed in the art to which this invention pertains.

The drum of my invention is designated B, is mounted upon suitable frame work of the machine and isdriven in an suitable manner, preferably by drive sha ts one of which is shown at 2, connecting the drum with the mixer drum not fully illustrated.

The drum is equipped at opposite ends with bevel gears 3 seen best in Fig. 3 and the shafts 2 previously referred to have bevel gears 4, one only of which is seen in the drawings, to establish a driving connection with the drum by meshing with the gears 3.

The particular means for driving the drum is not material to this invention as the same could be modified in a large number of respects without affecting the real inventive idea involved in my construction.

To the drum are attached the ends of the cable E the points of attachment being illustrated at 5 in Fig. 3. From the point of its attachment to the drum D each cable end is wound about the drum spirally toward its center and occupies a certain portion of a spiral groove formed in the periphery of the drum. After being wound about the drum in the manner stated each end of the cable E is extended downward toward the inner. end of the boom A, and one end passes around a pulley 6' on top of the boom, leads to the outer end of the boom, passes around a pulley 7 at the outer end of the boom and then extends back to the inner end of the boom. The oppositeend of the cable passes around a pulley 8 adjacent to the lower side of the boom at its inner end so that practically speaking the cable is comprised of upper and lower bights in planes aboveand below the boom A.

When the bucket B is in a position midway of the ends of the boom A equal portions of the cable E would be wound upon the drum D and occupy all of the groove which is formed in the surface of the drum excepting a portion approximately equal to that designated at 9 in Fig. 3. In other words, the area of the groove 9 shown in Fig. 3 as unoccupied by the cable remains substantially constant though this area shifts, so to speak, from one portion to the other of the groove as the cable E winds on the drum D, and unwinds therefrom, speaking in regard to opposite and reversely extending portions of said cable.

Nith the foregoing explanation the action of the mechanism is obvious, it only being necessary to state that a reversing of the direction of the movement of the drum D reverses the directions of winding of the end portions of the cable respecting said drum and as the end portion wound about the drum unwinds therefrom the other end portion winds thereon and occupies the space of the groove in the drum surface, from which the previously unwound portion is paid out.

By the simple construction and method of attachment of the cable ends to the drum, and the formation of the spiral grooves therein as stated, the advantages outlined in the first part of this specification are attained.

Another important advantage of the form of drum 1) involves its adaptability to maintain the cable E wrapped there around in such a small compass of space, so to speak, and as to prevent liability of improper action of the said cable respecting the drum, when the boom A is turned atrather extreme angles about its axis. In other words, the distance between the points 5-5 as seen in Fig. 3 is rendered comparatively short by the drum construction and mode of winding cables thereon. This permits the port-ions of the cable passing from the drum D to the pulleys 6 and 8 of the boom to be maintained in proper operative relation to the drum notwithstanding the shifting of the boom A horizontally throughout the range of its movement.

It is also notable that the drum D may be constructed as shown in Fig. 4, namely, without the grooves 9, but preferably with the inclined face portions designated at 10, the latter tending to cause proper winding of the cable on the drum. By omitting the groove formation the intermediate flanges between the grooves are done away with and the windings of the cable E may thus be additionally condensed so far as space occupied is concerned. In Fig. 4 the drum itself is designated D.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is 1. Cable driving means of the class described comprising, in combination, a drum, a cable, driven means attached to the cable, the ends of the cable being attached to said drum and wound thereabout in opposite directions toward the center of the drum, and operating means for the drum, the winding surface of the drum being such that as one end of the cable pays off of such surface in unwinding, the other end winds upon and occupies said surface previously occupied by the unwinding end.

2. In cable driving means of the class described, the combination of a drum equipped with means for driving it in opposite directions, said drum being formed with a one way spiral groove on its surface, a cable and driven means connected therewith, opposite ends of the cable being attached at spaced points to the drum and wound about the latter toward the center of the space between said end points of attachment of the cable and occupying the groove formed in the drum, the winding surface of the drum being such that as one end of the cable pays off of such surface in unwinding, the other end winds upon and occupies saidsurface previously occupied by the unwinding end, substantially as described.

3. Means substantially as set forth in claim 1 wherein the drum is constructed with a spiral groove over its. cable contacting surface adapted to receive portions of the cable wound about the drum.

t. Cable driving means of the class de scribed consisting of a drum having a grooved surface extending around the same, a cable the ends of which are permanently attached to the drum at spaced points in said grooved surface, said cable ends being wound about the drum in opposite directions toward one another and then extending away from the drum for attachment to an object to be driven, the winding surface of the drum being such that as one end of the cable pays off of such surface in unwinding, the ot er end winds upon and occupies said surface previously occupied by the unwinding end.

5. Means as claimed in claim 2, combined with a boom, an axis for said boom in line with the space between the points of attachment of the cable to the drum, and means on the boom actuated by the cable.

6. Cable driving means of the class described, comprising, in combination, a drum, a cable, driven means attached to the cable,

the ends of the cable being attached to said drum and wound thereabout in opposite clirections toward the center of the drum and operating means for the drum, the winding surface of the drum being such that as one end of the cable pays off of such surface in unwinding. the other end winds upon and occupies said surface previously occupied by the unwinding end, and vice versa.

In testimony whereof I afiix my signature.

OSCAR SHECK. 

